0%
20%
40%
60%
80%
100%
120%
1500 mA
1200 mA
1000 mA
Analog Dimming Control for 1000~ 1500mA only
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
0
H: > 3.5~8VDC or open circuit
H: > 2.6~5.5VDC or open circuit
300 ~ 700mA :
1000 ~ 1500mA :
L: < 0.5VDC or short
L: < 0.4VDC or short
24Vdc input
Voltage control(0.5~2.5VDC)
+Vin
0.5~2.5VDC
Io Adjustment by DC voltage :
+Vout
-Vin -Vout
1st LED
Last LED
Dimming
LDD-1000~1500L
DC-DC Constant Current Step-Down LED driver
LDD-L series
Duty Cycle (%)
0 255075100
25
50
75
100
◎ During PWM dimming operation, the output current will change to
PWM style.
I out(%)
Tol : 3%(Typ.)±
Derating Curve
Ta ( )℃
LOAD (%)
-40 0 25 50
71
85
50
25
75
100
100
71 for 600~1500mA℃
85 for℃
300~500mA
Peak. Temp 240℃
10 sec. Max.
60 sec. Max.
(>220 )℃
220℃
Time(sec.)
0
50
100
150
Temperature ( )℃
220
240
Reflow Soldering Curve (for LDD-300~1500LS)
PWM Dimming Control (for 300~1500mA)
PWM
Signal
Output
Current
H(5V)
{
{
Max
L(0V)
0
OFF OFF OFF
ON ON
100~1KHz
ON
Remark : The curve applies only to the " Hot Air Reflow Soldering"
PWM Frequency :
300~700mA : 100~ 1KHz
1000~ 1500mA : 100~500Hz
File Name:LDD-L-SPEC 2018-05-11
+Vin
Io Adjustment by PWM signal :
Iout
+Vout
-Vin -Vout
1st LED
Last LED
H
PWM
Dimming
L
LDD-300~1500L
